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San Francisco Public Works: Ping Pong Popup with Mayor 11-2-2012 037
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San Francisco Public Works: Ping Pong Popup with Mayor 11-2-2012 126
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San Francisco Public Works: Ping Pong Popup with Mayor 11-2-2012 255
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San Francisco Public Works: Ping Pong Popup with Mayor 11-2-2012 272
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San Francisco Public Works: WP_000320